Valve



(No Model.)

W. F. DURPEB.

VALVE.

Patented Aug. 4, 1885 iff/esse;

N Pneus. Pmwmmmmr. Wmme". me.

IINTTED STATES PATENT @Erica IVILLIAM I?. DURFEE, OF BRIDGEPORT,CONNECTICUT.

VALVE.v

SPECIFICATION forming part of Letters Patent No. 323,404, dated August4,1885.

' Applicaticn tiled March 28, 18S-l. (No model.)

To all :whom t may concern.-

Be it known that l, WILLIAM F. DUREEE, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State oi'Connecticut, have invented certain new and useful Improvements inValves; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the artto which it appertains to make and use the same.

My invention relates to that class of valves which are especiallyadapted for use in connection with hydraulic cranes, presses, 85e., andhas for its object to produce a perfectly-balanced sliding valve whichshall be simple in construction, easy to operate, and which will notleak. lVith these ends in view I have devised the novel constructionwhich I will proceed to describe, referring by letters to theaccompanying drawings, forming part of this specification, in which-Figure l is an elevation of the device coniplcte; Fig. 2, a transversesection on the line xx, Fig. l; Fig. 3, a longitudinal section, with therack and lever in elevation; and Fig. 4, a view illustrating a modifiedform of operating mechanism.

Similar letters indicate the same parts in all the figures.

A, A', r A3, and AL represent a series of castings, which are held inposition by four longitudinal bolts, B.

Il is a flange cast with or secured to casting A2, by means of which thevalve is held in place by bolts or in any suitable manner. A centrallongitudinal opening extends through all of these castings, which, incastings A, A2, and A, is sul'licien tl y enlarged to form circularchambers c, ai, and ci, which may be termed, respectively, dischargeinductiom and circulating chambers. Gastin gs A, A2, and

A are provided at both ends and castings- A and A* at their inner endswith concentric recesses I) I). At the inner edges of these recesses themetal is smoothed awa-y, leaving rounded corners b ZJ.

C C are metallic disks, preferably of brass, which also have centralopenings. These disks are thickest at their central openings, the metalbeing curved down to a feather edge, c, on both sides of the centraldisks and on the inner sides of the two enddisks. The

disks are circular in forni, and are the exact diameter of the recessesin the ends of the castings, so that in assembling the castings arecentered by the disks.

Between the disks and the castings I place cup-leathers D D, which areclosely held bctween the curved surfaces of the disks and the roundedcorners of the castings.

E is a tube or cylinder closed at its ends and having circumferentialperforations c at two points in its length. This cylinder closely litsthe two end castings and the metallic disks, and is adapted to havereciprocatory movenient therein.

F is the induction-pipe,which communicates with chamber c2,- G, theeduction-pi pe, which is connected with chamber c,- and H, thecirculating-pipe, which leads from chamber a to the jack or otherapparatus to which it is desired to convey water.

K is a bar which slides in a way or groove, K, in casting A. This bar isprovided upon one side with stops K", which engage the beads ofsetserews Kt, projecting from casting A, to limit the movement of thebar, as shown in Fig. 3. On a portion of its length the bar is providedwith rack-teeth Ki'.

L is a lever pivoted in bearings L', which project upward from thecasting A. At the teeth L3, which engage with raclcteeth K2 upon the barto operate the saine.

The tube or cylinder E extends through the central openings in theseries of castings and and in the two end casti ugs, A and A", which arethe bearings in which it reciprocates.

W'hen the parts are assembled, the cupleathers are held between thecastings and the disks, and are pressed against the cylinder, thuspreventing any appreciable leakage .or escape of water from one chamberto an other. Should slight leakage occur outward from chambers a or c",by means of water passing between the cup fleather and disk and thetube, this leakage will collect in small chambers M in castings A andA", from which wastepipes h' lead. These pipes are Kconnected with theednction-pipe G, so that escape of water outside of the valve ispractically iinpossible. As an additional precaution against leakage, itwill be noticed that the cup-leathlower end oi' the lever is a sector,L2, having the disks G C, litting closely in all of the disks 1 ICO erson each side of the disks are of sufficient length to bear for a shortdistance upon the tube, the ends of said cup-leathers extending outwardinto the chambers from the point at which they are held betweenthe-feather edges of the disks and the rounded corners of the castings,so that the pressure of the water in the chambers is upon the outersurface of the cup-leathers. The greater the pressure of water,therefore, in any of the chambers, the closer the cup-leathers will bindthe tube and the less willbe the possibility ot' any water escapi ng.

N N are upright supports, into which the ends of the tube are screwed,and which rigidly connect the same with bar K by means of bolts N 2, orin any suitable manner.

N N are gaskets against which the ends of the tube bear to securewater-tight joints.

,The operation is as follows: The water enters chamber at all timesthrough pipe F. Vhen the valve is open, as shown in the drawings, thewater passes from-chamber a2 through the right-hand series ofperforations cinto tube E. The water escapes from the tube through theleft-hand series of perforatious into chamber a, and from thence itpasses into pipe H, which leads tothe jack or other apparatus which itis desired to operate. To stop the iiow of water, lever L is lifted to avertical position. As the lever is lifted the teeth upon the sectorengage with those upon bar K, moving the bar, and with it the tube,toward the right. XVhen the lever is in a vertical position, the tubewill have been car-` ried toward the right su'fiicient distance tobring' the right-hand series of perforations in contact with the innerface of the disk between chambers at and a3. In practice I usually makethe perfor-ations in two rows extending entirely around the tube. Thenumber and arrangement of these perforations or orifices, however, is amatter of no consequence, except to this extent, that the right-handseries must be within a space longitudinally of the cylinder, which isless than the bearingi'ace ot' the disk between chambers e? and a, sothat the perforations may all be covered thereby. Vhen the parts are in-the position just described, no water can pass from the valve into pipeH, nor can any water pass from said pipe into the valve. In use the tubeand f chamber a are always filled with water, said chamber being madesufficiently long so that at neither extremity of the motion of the tubecan the left-hand'series of perforations pass outside of it. be receivedfrom pipe H at any time, the direction of the flow depending upon theposition of the right-hand series of perforations relatively to chambersat and a. When lever L is in the vertical position just referred to,there can be no circulation of water. The

jack or other apparatus will consequently be held stationary, the partsremaining in the exact position they occupied when the ilow of waterinto pipe I-I was cut off.

'Io reverse Vater may thus pass into orthe-flow of water, lever L ismoved over to the left to about the corresponding angle of inclinationto that shown in Figs. 2 and 3-that is to say, the lever will then standat the same angle relatively to aperpendicular line drawn through itsaxis, as is shown in Figs. 2 and 3, but will be at theleft of saidline,instead of at the right, as shown. This movement,by means of the sectorand rack, carries the tube to the right, bringing the right-hand seriesof perforations into chamber a, into which the water in the tube andpipe H flows, then out through eduction-pipe G.

It will be observed that by my improved constructionlsecure aperfectbalance of pressure, no matter what may be the position of the tuberelatively to the induction, eduction, or circulating chambers; also,that the movement of the parts is positive and the action instantaneous.

It will of course be obvious that the details of construction may bevaried considerably without departing from the spirit of my invention,the gist of which consists in the use of a sliding tube havingtwo setsof perforatious, one of which remains constantly within the limits ofthecirculating-chamber, the other set being adapted to be moved into theinduction or the eduction chambers or placed contiguous to the innerface of the metallic disk which separates said chambers.

rlhe operating mechanism shown is not an essential feature of myinvention, but will be found preferable for many uses. Instead of thesector and rack, however, movement may readily be imparted to tube E bymeans of a quick-acting screw having bearing in a separate casting; or,as shown in Fig. 4, casting A4 may be prolonged into an outwardly-curvedarm, A5, to which the lever may be pivoted. In this construction no rackand sector are used, and instead of being screwed into a support, N, thetube is provided with a slotted head, N3, within which the lever ispivoted, the end of the lever being also slotted, as shown, to permitfree movement on the pivot.

Having thus described my invention, I claiml. In a valve, thecombination of a plurality of annular sections,A A2 A3, the ducts F G H,a sliding tube of less diameter than the interior of said sections andhaving the apertures e, and the disks G and their packings clampedbetween the ends of said sections and forming bearings for the slidingtube, and partitions for dividing the annular space between the tube andsaid sections into chambers, substantially as set forth.

2. In a valve,v the combination of a watertight casing having ductscommunicating therewith, a tube adapted to slide therein and place thedesired ducts in communication with one another, said tube beingconnected with a parallel bar, also adapted to slide in the casing,whereby the alignment of the tube is maintained, substantially as setforth.

3. In a valve, the combination of a water- ICO tight casing having ductscommunicating therewith, and a tube adapted to slide therein and placethe desired ducts in communication with one another, said tube beingconnected with a parallel bar, also adapted to slide in the casing, thebar being provided with a rack, and the casing with a lever and segmentfor actuating the rack and tube, substantially as set forth.

4. In a valve, the combination ofa plurality of annular sections, A A2Ai, the ducts F G H, a sliding` tube of less diameter than the interiorof said sections and having the apertures e, and the disks C and theirpaekiugs clamped between the ends of said sections and forming bearingsfor thesliding tube, and partitions for dividing the annular spacebetween the tube and said sections into chambers, said sections havingin their ends the recesses b, adapted to receive and t the disks C,thereby centering the sections, substantially as set forth.

- 5. The casting A, having a groove, K', andA

